Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342
Edition: Model Aviation - 1977/07
Page Numbers: 6, 7, 8, 9, 10, 11, 12, 13, 14, 87, 88
Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342
Edition: Model Aviation - 1977/07
Page Numbers: 6, 7, 8, 9, 10, 11, 12, 13, 14, 87, 88
Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342
Edition: Model Aviation - 1977/07
Page Numbers: 6, 7, 8, 9, 10, 11, 12, 13, 14, 87, 88
Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342
Edition: Model Aviation - 1977/07
Page Numbers: 6, 7, 8, 9, 10, 11, 12, 13, 14, 87, 88
Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342
Edition: Model Aviation - 1977/07
Page Numbers: 6, 7, 8, 9, 10, 11, 12, 13, 14, 87, 88
Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342
Edition: Model Aviation - 1977/07
Page Numbers: 6, 7, 8, 9, 10, 11, 12, 13, 14, 87, 88
Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342
Edition: Model Aviation - 1977/07
Page Numbers: 6, 7, 8, 9, 10, 11, 12, 13, 14, 87, 88
Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342
Edition: Model Aviation - 1977/07
Page Numbers: 6, 7, 8, 9, 10, 11, 12, 13, 14, 87, 88
Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342
Edition: Model Aviation - 1977/07
Page Numbers: 6, 7, 8, 9, 10, 11, 12, 13, 14, 87, 88
Ch RC craft itoi task properly reasons selection pn size aircraft Like torswes committed falls wing span appropriate you read ev car 4th Bob Nelitz publica MA Scale plan w asu Off Sport Scale far Sport Scale version resigners approach duptaca design philosophy rerformance eiccome u zn drafting pretty airplan flight characteristics Webra Speea illy important arent building especiatly overa Bob ejull fac 2 SURPRISINGLY Chipmunk designed 30 years ago Eyeing replacement market weary deHavilland Tiger Moth Chipmunk brainchild designer WJ Jaki muik prototype CF-DIO-X first ven tured off ground May 22 1946 designed manufactured flight tested deHavilland Aircraft Canadas Downsview plant Toronto total 1547 Chipmunks prograbbed available can seen today hands private owners flying clubs After speaking pilots flew Chipmunk eventually getting own hands controls became obvious aircraft would make fine RC subject However felt emulate full-scale stable docile handling characteristics would have fairly large model Dayton Nationalsthis its outstanding realism 4 duced 1250 United Ki ing pretty split gre4 opy thousands pilot air forces took ab-initio Chipmunk until 1956 acquired Chipmunk trainer maintaining until finally retired ready rt-overpowered becomeanother an-pattern ship scale outline n After collecting muchthe inprototype could fhd inclunal factory working F maintenance commEflr spe nor rudder trim adjustment neces sary delightful models ever flown very stable responsive control functions speeds no bad habits whatsoever making very easy fly fully aero batic well Construction Fuselage The fuselage constructed di rectly over plans via familiar crutch former planking method Note 1/64 plywood between formers F-2 F-4 serves dual purpose adds strength cockpit area its lack bulkheads provides smooth surface cockpit detailif desired ply wood need go down far wheel spar position provides strong anchor necessary belly would difficult apply area because compound curves balsa planking should extend nd F-2 position will leave surface enable application fiber glass tapes joining fiberglass nose piece planked fuselage Install tapes inside nose section after cutting out radio access hatch must admit desirable have radio same compartment fuel tank however found necessary case Because long tail moment completed model becomes tail heavy eliminate undesirable nose ballast mount equipment well ward have encountered no problems cause Just sure mount new good quality fuel tank such Kraft As added precaution place fuel tank connections well-sealed poly ethelene bag just case Seal battery pack receiver plastic well fiberglass access hatch should tight fitting possible seal Vaseline time opened prevent ex haust drippings seeping com partment cowling spinner both fash ioned fiberglass cowl moulded piece sawed five sec tions put together illustrated drawings lower portion removed replaced aluminum section Canopy One area will provide what will seem like insurmountable challenge canopy Because its size com pound curves difficult form using limited capacity workshop household oven First carved male plug balsa blocks over poured female mould plaster paris two halves details supplied documentation world competition must duplicated model including close attention smallest cockpit de tails Most components shown fashioned sheet small pieces aluminum strunlents photographed full-size sub ject put behind casings aluminum pipe 8 Model Aviation Mob machine major trophies won during 1976 Ito R British Scale Trophy World Cham pionship Sweden FAI Gold Medal Sweden Montreal R/C Club Special Achievement Award First AMA Scale US Nats Dayton First FAI Scale Ottawa R/C THE DE HAVILLAND DHC-1 CHIPMUNKPERFORMANCE DATA IS SINGLE ENGINE LOW WING MONOPLANE DF METAL AND FABRICCRUISING SPEED 8KNOTS CONSTRUCTION HAVING FIXEDSTALLING SPEED FLAPS UP 48 KTS UNDERCARRIAGE THE AIRCRAFT ISSTALLING SPEED FLAPSDOWN44 KTS POWERED BY ONE GYPSY MAJORTAKE OFF DISTANCE YARDS ENGINE FITTED WITH FAIREY REIDLANDING DISTANCE YARDS FIXED PITCH METAL PROPELLER THE AIRCAFT IS INTENDED FOR THE INITIAL TRAINING OF STUDENT PILOTS AND FOR THE PREPARATION OF THESE STUDENTS FOR MORE ADVANCED TRAINING AIRCRAFT SOME LATER CHIPMUNKS WHERE MODIFIED TO ALL METAL COVERING BLUE Rk COLOR SCHEME AIRCRAFT IS PAINTED TRAINER YELLOW WITH ANTI-GLARE BLACK ON TOP OF COWLING AND LEADING EDGE OF STABILIZER COCKPIT IS BARE ALUMINUM INSIGNIA AS NOTED 6 WING ROOT AND TIP AIRFOIL WINGSPAN 344 II II qQ aj 5 DIHEDRAL 8 11 12 BLUE REDWHITE 6 0 DE HAVILLAND DHC-1 2 255 July19779 pouring another male plug plaster reinforced plywood wood met al made cover frame pull hot plastic down over mould fash ioned about dozen canopies before got acceptable can offer two solutions problem locate full-size Chipmunk British split type canopy copy itwhich would no problem since constructed flat pieces Plexiglass may con tact Bill Hempel Hobby Barn Tuc son has offered supply canopies request based original mould Wing Because large wingspan 86 wing original con structed two halves mainly ease transportation method shown has proved adequate strength can attached flying mere seconds Having wing hold-down bolt per wing panel makes narrow aluminum strip around wing root section manda tory Note holes aluminum strip makes good adhesion covered nylon fiberglass tapes strip seats wing securely prevents up down movement trailing edge As shown top view plans 3-in fiberglass reinforcing tape should fiberglassed spanwise fuse lage belly wing root wing root about center chord position Thewing constructed using wing jig make sure two degree wing tip wash-out incorporated struc ture important ensure model retains gentle stall characteris tics prototype wing spars made /4 sq medium balsa 018 braided controlline cable sandwiched between spar 3/32-sheet leading edge covering wing root tip top bottom done add strength save weight has proved adequate could modi fied using /4 sq spruce spars hinges flaps aileron cut 1 / 16 aluminum using Dremel moto shop jig saw nylon bushings used hinges came inside tube commercial Nyrod type con trol rods variety just fits Morris 1-72 bolts perfectly line up three sets hinges control sur face install two extreme hinges first sight through holes line up center hinge method provides very workable hinge well being scale ap pearance Lock 1-72 nuts painting nut thread epoxy paint after assembly Use good quality aileron bellcrank such DuBro have found brand have almost no play slop its ac tion critical because long aileron pushrods extra joint neces sary removable wing panels Too much play aileron could cause aile ron flutter Tail Surfaces tail surfaces 10 Model Aviation IiIIII L]I _L- -0 __A ETA__ _- K- iy ______________________ $i11 J _____________ T r lB PLVWOrnII1LArDHT ~ TALNRBOR CARVE TIPS FROM SOFT BALSA II V ST 3332 SOELT 318 P 00000 RB STAB RIBS 2232 BALSA ~~ 0W16 LINK I I BROBROI IN HINGEI POINTI IV EPORY AND COUER TUBE SPLINE1116 ALUM ATTACOALOMINUM ROOT B TIP PATTERNS -rWINS ATTACHMENTJOINT FOR WINSWING ROOT PATTERNTO FLAP ROOT SANDWICH TOSETOER TOES _____/ 000 AILERON RELCOANOII ____________________________III 0II IIIII II IIII u ~ II 90116 BALSA IFLAP PUSOROT I10010 PLASTRUCT OP U BOO TOM 010 ALUMINUMAILERON -06 ALUBINAM /PLASIRICT 9 BRASS SCREWS NYLON BUSRINAFLAPORTEORAL 5 3I03ASS 0so LRj2LIMANDDHCI jBR_ FULL-SIZE PLANS AVAILABLESEE PAGE 96 C Co -J -a -a Left Landing gear fashioned 5/8 aluminum tubing 3/16 music wire inside brake disc blocks machined Unimat lathe working parts shim brass Robart tires have correct scale tread spacing Above Compression spring strut duplicates 0100 action straightforward construction should present no difficulty careful select softest wood practical tail sec tion construction keep area light possible Note hinge point rudder elevator extends back control sur face providing scale type hinge move ment Using DuBro Kwik-link connected section 1/16 nylonsuch discarded section aileron bellcrank shown tail wheel steering armbe sure secure nylon portion 1 / 16 dowel epoxy Kwik-link portion screwed onto threaded 2-56 machine screw permanently epoxied stabilizer Finishing After structures have sanded prepared covering open Lower fuselage belly showing fairling lines wing root flap hinges scale type Note opened aileron servo hatch Close spection will reveal unobtrusive scale details 12 Model Aviation Left Rudder elevator linkages internal feature minimizes items could say model Elevator trim attained means precise-scale tab Right Rudder elevator horns 1/2 aileron bellcranks modified bolted 1/4 aluminum tubing structures covered Silron heavy Silkspan used over wooden struc tures such fuselage fin stabilizer applied nitrate dope Nitrate has superior adhesion qualities compari son butyrate important permits use resin epoxy paints over curing problems allow weave Silron show through finish simulating proto type fabric covering wings elevator rudder use four coats nitrate dope coat K&B primer two color coats After three coats clear apply coat silver silver necessary solid opaque finish color preventing wing structure silhouette flying over head against bright sunny background After silver has light sanded add rib tapes over ribs trailing edges against wing tip blocks desired method used making rib tapes pre-doped Silkspan over wooden frame three coats side stripped tapes using serrated edge aluminum foil box sure tear tapes across grain Silkspan otherwise sharp clean edge will impossible tapes dipped dope thinner applied rib locations certain place stripped tapes correct position first try because will stick almost im July1977 13 Above Stenciled lettering throughoutas first-aid kit ground starting Socket hinged door Ilower lelt photolis precise spite its very small size Right Scale spinnernote rivetsattaches real ship Webra Speed engine flies big 11-lb ship ease Left Servos located tank compartment balance requirements time hatch removed resealed vaseline prevents fuel goop entering radio compartment Right Functional scale-like exhaust silver soldered 012 brass shim stock Du-Bro ball-link connector aileron pushrod snaps together using needle nose pliers end pushrod has small aluminum tube insert fiberglass srrowshafteasy separation ball link twist screwdriver Right Joining wing requires seconds set up field Hold-down bolt made 4-40 machine screw soldered brass tubing Note simple spline connection flap bar actuator mediately tapes dry lightly sand add simulated rib stitching done drafting pen using white India ink marking stitch position painted later epoxy will stand out just right amount scale appearance wooden surfaces previously stated covered Silkspan stead Silron fiberglass cloth save weight Apply two coats surfacing resin over Silkspan After sanding add simulated metal panelingif desired accomplished build-up resin against multiple thicknesses masking tape Prepare tape putting three lay ers tape onto large piece clean glass straightedge sharp knife cut down center will give sharp clean edge mounted model Now against edge brush two three coats resin starting about inch away right up tape dry sand remove top tape sand again Now remove rest tape Start simulated paneling rear fuselage work forward cause paneling full-scale aircraft overlaps rear Start tip metal portion wings Finally rivet detailing can added just before final primer color coats sprayed two coats K&B Super Poxy entire model Epoxy provides very durable sur face unlike dope will bridge around small details such rivets panel seams beware heavy Colors K&B Super Poxy used Chipmunk Trainer yellow7 cc teaspoon #8103 red added half pint #8116 yellow Anti-glare black#8 104 black flat Continued page 87 14 Model Aviation Left The aileron servo located belly aircraft Above wing flaps extended position Flap pushrod made Plastruct rectangular tubing Wing walks used #120 sand paper painted black epoxy Flaps produce no noticeable trim change Above Some under-wing scale details including retracting landing light scala-like zipper inspec tion openings moor-here tie-down rings soldered tin stock functional Below Under view flaps extended position shows scale hinging actuation NEW SPRING ACTION KWIK KLIPS IDEAL FOR PLANES. BOATS. CARS Its finally here! battery clip wont ever slip vibrate off LOCKSSpring action locks Kwik-Klip onto r-plug continous positive contact indestructable steel nylon parts Available battery wires best 150 battery wires 70C Theyet engine starting accessories No 1 51 battery wires Si 25 Patent ding 34 QUICK ASSEMBLY RO KWIK-LINK Ifl tried true spring steel Kwik-Link Ideal control linkage 2 No109 5C FRICTION BRAKE Complete 10 pc nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little engage NO 157$295 WheIotckded 1/2 KWIKKLIPS engines 020 074 No 148 battery wires 65pressure oBELPp0 No 149withbatterywires $115 Shown actual size 048m PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA area start flip Did ever catch yourself talking plane day before contest Did ever have bee land nose youre setting up three rolls Did ever go flight line get go-ahead judges suddenly realize transmitter still impound Did ever find out No vice edged out flew C-Expert four years ago Did ever come landing foot over spot discover gear up Did ever find out beautiful pattern ship just completed weighs ten pounds minus fuel have never done things go ahead jump pattern competition both feet can go crazy just like did response letters received encouraging publish proper tech niques pattern maneuvers next month intend include personal observations comments AMA District III vice president world-class pattern competi tor Don Lowe Ron Van Putte 12 Connie Dr Shallmar FL 32579 Chipmunk/N elitz continued page 14 hardener Insignia81O3 red #8101 white blue 1 part #8104 black 3 parts #8 105 royal blue insignia lettering masked adhesive shelf paper painted small lettering Letterset painted over clear epoxy fuel proofing Hying Chipmunk easy fly anyone has mastered basics RC flying Although large model no way underpowered find Webra Speed normally fly between ttle using full power maneuvers takeoffs Longer realistic takeoffs can accomplished use ttle However cause aerodynamically clean aircraft will fly surprisingly fast speed its size using full power Mine weighed just under 11 pounds conform FAI weight rule gives wing loading just under 24 oz may make better windy weather aircraft weighing pound af fecting its flight characteristics Thanks its wide wheel base long tail moment wont find much difficulty keeping model straight during its takeoff land ing roles spite being tail drag ger found about 1/4 right-rudder trim required seems take care slight left swing takeoff same result could perhaps created few degrees right side-thrust mo tor have actually tried because felt would detract scale outline cowling find best realistic take offs require hold slight amount up elevator prevents tendency tail rise too high takeoff tail will still rise its own further flying speed has attained will lift off its own usual jerk common models rotation Once airborne very stable built true will fly hands off almost indefi nitely attractive feature just slow can flown still have very good aileron response stalls gently will snap-roll stall yet will spin time called recover immediately upon release rudder Virtually no elevator trim change takes place flying inverted Chipmunk few fullscale aircraft does have large elevator trim change upon extension flaps Im too sure model will respond use flap-eleva tor trim tab arrangements shown tab operating defy anyone notice flaps extended re tracted observing flight path model just isnt trim change elevator flaps deployed cidentally tab operates reverse operation prototype model flaps down trim tab down full-size aircraft trim tab would move elevator modelbecause July1977 87 r [Au I/C IrnI BOX 511E HIGGINSVILLE MISSOURI 64037 fixed neutralthe tab becomes af fect another elevator hope makes sense wish much success have anyone decides build Chip munk Whether go AMA Scale Stand-Off youll pleased its flying characteristics can en joy relaxed pace slower flyingscale machine RC Scale/Atkinson continued page 24 time greats 30s 40s An easy new construction method used build ing new kits Stinson SR-6 Reliant straight-wing also works subject old-timers 30s 40s Im sure have seen ads radial cowling available World Engines received Its fine piece work rocker arm covers excellently done Diameter 5 inches works well 40-size scale model cowl intended Worlds Mr Mul ligan scale kit may used radial-engine classic scale birds Also biplanes such Jungmeister publications concerning all-time great aircraft heard published Arco Publishing Co 219 Park Ave South New York NY 10003 specialize WW-II aircraft deHavilland Mosquito written Mr Hardy England great interest complete history Mossie versatile aircraft WW-II con structed entirely wood unusual WW-II since service aircraft constructed metal Mosquito also used 8th Air Force England listing some coming con tests Kansas City Radio Control Assn Scale Pattern will held June 11-12 have excellent 600-ft runway Scale Sigs contest although strictly Scale will held June 18-19 case dont belong Biplane Assn biplanes necessarily have Stand-Off Scale points awarded bi plane resembles full-size ship Also new event has added Biplane Assn meet monoplanes will compete strictly against other monoplanes must copied full-size acrobatic aircraft such Chipmunk Zlin World War II fighter planes such P-SI Me-109 Zero actually acrobatic aircraft scale contest notice Bob Strobel 12000 Tecumseh Redford MI 48239 phone 313-937-8678 Date June 26 Three events will held WW-I WW-II non-military Sponsored Mid west R/CSocietyThats off Toledo Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 R C Helicopters/Schoonard continued page 25 come off flight will make better starting because better connections Fuel Tank Auxiliary Feed Jet Ranger plans show fuel tank crosswise fuselage fine except tight left-hand turns fuel can run away pickup suddenly engine goes dead disastrous results flying buddy Norm Holland worked out very good auxiliary tank arrangement uses regular 16- 18-ounce tank standard location 2-ounce slant py lon tank silicone glued transmission box left side Note picture plumbing sounds complicated isnt follow directions tank needs pickup tube overflow tube Run line muffler-pressure tap overflow tube large tank large tank-pickup tube should con nected overflow tube small tank Make sure overflow tube small tank bent will go up upper corner tank will fill completely pickup tube small tank should go filter engine fill line engine should broken before filter small tank fills first over flow fills large tank vents muffler can fill breaking line run through Robart Fueler highly recom mend Robart Fueler prevents engine flooding fueling also permits turning engine over no fuel going just turning switch auxiliary fuel tank virtu ally impossible get helicopter position will starve fuel plus added safety 2 ounces fuel capacity sure safety secure plumbing connections sliding /8 sleeve fuel tubing over plumbing tubing joint Landing Gear Attachment Probably unsightly impractical thing Jet Ranger landing-gear shocks impractical fact hard landing unbelievable pressure exerted joint attach fuselage cross struts have seen shocks driven right through bottom fuselage plus breaking landing struts just hard landing better way attach landing gear bolt directly fuselage way least 5 inches landing strut contact fuselage looks far better too Fuselage Cabin Top last months col umn left out important parts attaching #9 servo tray What left out center mounting o tray mounted front rear lift pressure point exerted just front aluminum-bearing box use 6 X e /8 plywood goes under #9 extends under #9A side secured side #9 4X40 screw goes through #9 blind nut cross support servo tray needs removed support can slid out through rear windows product review product review product review Tail Rotor Delta Hinge rigid hub 88 Model Aviation SERVING THE R/Cer SINCE 1953 Since weve business 24 years can sure stay offer service customers years come youre interested what have offer send $1 complete catalog Add $50 1st Class mail return oroduct review product review product review Ducted Fan Designed ob Kress ot Grumman Aerospace unit light strong efficient qualities allow used good stock engines Racing engines essential tailcone fuel tank Pressure required Engine can throt tled Unit comes four sizes 049 20 40 60 Midwest Products Co 400 S Indi ana St Hobart IN 46342